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Code PO306

Everything on the Volvo S80. Sometimes called an "executive car", the S80 was Volvo's top-of-the-line passenger car. P2 platform.
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cattails33
Posts: 1
Joined: 26 February 2013
Year and Model: S80, 2000
Location: USA

Code PO306

Post by cattails33 »

My 2000 S80 2.9L recently began acting sluggish and running rough and also the check engine light came on and is blicking. Checked for problems and found code PO306. Switched #6 Coil and spark with #5 and still acting same. The sparkplugs were all changed about 300 miles ago and still look good. Can anyone give me some suggestions on what to look for to cure this problem.

Regards...Charlie
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mikealder
Posts: 817
Joined: 25 October 2009
Year and Model: V70 2000
Location: Blackpool
Been thanked: 13 times

Post by mikealder »

What make of plugs have you fitted as it is possible it has fouled up the plug in No6 leading to the missfire code for that cylinder - Mike
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